None of your axes are smooth, particularly X and Y - I suspect you need to adjust the motor current on the pololu chips. Your homing speeds could be reduced a bit too.
Also, do you have Ramps? If so, do you have 3 jumpers installed under all 4 pololu driver chip boards?
Your Y axis drive belt seems a bit sloppy too.
The Z axis, when homing, should hit the end-stop, then cycle up a few mm, then settle back to re-actuate the endstop switch (like the other axes). Yours does not so I would suspect that
maybe the switch contacts are dodgy (if its mechanical) - I would check it several times with a meter.by moving the Z axis up out of the way then actuate manually on and off with your finger.
I would have thought that your Y endstop should be located at the other end (idler end)
Now to look at the firmware...
Edited 1 time(s). Last edit at 09/16/2014 05:59PM by waitaki.
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Waitaki 3D Printer